Toyota RAV4 manuals

Toyota RAV4 Service Manual: Torque converter clutch solenoid performance (shift solenoid valve dsl)

Toyota RAV4 Service Manual / U140f automatic transaxle / Automatic transaxle system / Diagnostic trouble code chart / Torque converter clutch solenoid performance (shift solenoid valve dsl)

Toyota RAV4. Torque converter clutch solenoid performance (shift solenoid valve dsl)


Description

The ecm uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor, intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condition of the lock-up clutch.

Then the ecm compares the engagement conditions of the lock-up clutch with the lock-up schedule in the ecm memory to detect mechanical problems of the shift solenoid valve dsl, valve body and torque converter clutch.

Toyota RAV4. Torque converter clutch solenoid performance (shift solenoid valve dsl)


Monitor description

Torque converter lock-up is controlled by the ecm based on the speed sensor (nt), speed sensor (nc), engine rpm, engine load, engine temperature, vehicle speed, transmission temperature and gear selection.

The ecm determines the lock-up status of the torque converter by comparing the engine rpm (ne) to the input turbine rpm (nt). The ecm calculates the actual transmission gear by comparing input turbine rpm control voltage to counter gear rpm (nc). When conditions are appropriate, the ecm requests "lock-up" by applying control voltage to the shift solenoid valve dsl. When the dsl is turned on, it applies pressure to the lock-up relay valve and locks the torque converter clutch.

If the ecm detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ecm interprets this as a fault in the shift solenoid valve dsl or lock-up system performance.

The ecm will illuminate the mil and store the dtc.

Example:

When any of the following is met, the system judges it as a malfunction.

  1. There is a difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ecm commands lock-up.

    (Engine speed is at least 100 rpm greater than input turbine speed.)

  2. There is no difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ecm commands lock-up off.

    (The difference between engine speed and input turbine speed is less than 35 rpm.)

Monitor strategy

Toyota RAV4. Monitor strategy


Toyota RAV4. Monitor strategy


Typical enabling conditions

Toyota RAV4. Typical enabling conditions


Typical malfunction thresholds

Either of the following conditions is met: off malfunction or on malfunction

Off malfunction


On malfunction

2 Detections are necessary per driving cycle:

1St detection: temporary flag on

2Nd detection: pending fault code on

Vehicle speed must be under 10 km/h (6.2 Mph) once before 2nd detection

Toyota RAV4. On malfunction


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

Hint:

Performing the intelligent tester's active test allows relay, vsv, actuator and other items to be operated without removing any parts. Performing the active test early in troubleshooting is one way to save time.

The data list can be displayed during the active test.

  1. Warm up the engine.
  2. Turn the ignition switch off.
  3. Connect the intelligent tester to the can vim. Then connect the can vim to the dlc3.
  4. Turn the ignition switch on and turn the tester on.
  5. Enter the following menus: diagnosis / enhanced obd ii / active test.
  6. Follow the instructions on the tester and read the active test.

Toyota RAV4. Inspection procedure


Hint:

  1. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

Hint:

Toyota RAV4. Inspection procedure


  1. Check other dtc output (in addition to dtc p0741)

  1. Connect the intelligent tester to the can vim. Then connect the can vim to the dlc3.
  2. Turn the ignition switch on and turn the tester on.
  3. Enter the following menus: diagnosis / enhanced obd ii / dtc info / current codes.
  4. Read the dtcs using the tester.

Result


Hint:

If any other codes besides p0741 are output, perform troubleshooting for those dtcs first.



  1. Inspect transmission wire (shift solenoid valve dsl)

Toyota RAV4. Inspect transmission wire (shift solenoid valve dsl)


  1. Disconnect the b27 wire connector.
  2. Measure the resistance of the transmission wire.

Standard resistance




  1. Check wire harness (transmission wire - ecm)

Toyota RAV4. Check wire harness (transmission wire - ecm)


  1. Disconnect the b30 ecm connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




Replace ecm

  1. Inspect shift solenoid valve dsl

Toyota RAV4. Inspect shift solenoid valve dsl


  1. Remove the shift solenoid valve dsl.
  2. Measure the resistance of the solenoid valve.

Standard resistance: 11 to 13 ùat 20°c (68°f)

  1. Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise.

Ok: valve moves and makes operating noise.



  1. Check transmission wire

Ok: the connectors and pins are securely installed.

There is no open or short on the wire harness.



  1. Inspect transmission valve body assembly

  1. Check the transmission valve body assembly.

Ok: there are no foreign objects on each valve.



  1. Inspect torque converter clutch assembly

  1. Check the torque converter clutch assembly (see page ax-153).

Ok: the torque converter clutch operates normally.



Repair automatic transaxle assembly

Brake switch "B" circuit high
Description The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the brakes are suddenly applied. When the brake pedal is depressed ...

Pressure control solenoid "A " performance (shift solenoid valve sl1)
Description The ecm uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear). Then the ecm compares the actual gear with the shift schedule in t ...

Other materials:

Diagnostic trouble code chart
Look for output diagnostic trouble codes (dtcs) (from the dtc checks) in the appropriate section's diagnostic trouble code chart. Use the chart to determine the trouble area and the proper inspection procedure. A description of each of the chart's columns are below. Item Description ...

Initialization
Initialize sliding roof drive gear subassembly Notice: When replacing the sliding roof drive gear, the sliding roof drive gear requires initialization. If a reset is not executed, the following functions do not operate: auto operation and key off operation. Turn the ignition switch on. ...

Steering wheel audio switches
Some audio features can be controlled using the switches on the steering wheel. Operation may differ depending on the type of audio system or navigation system. For details, refer to the manual provided with the audio system or navigation system. Operating the audio system using the steering ...

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